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Can you just change the tap tails? I’m not confident enough on how flow at the tail/pressure turns into flow rate out the tap if it still is constricted though the tap body.
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Flow rate and pressure are different things.
Assuming bad flow rate: this requires a wider aperture, I doubt your taps would have a wider aperture than the tails used to attach them, but there's a slim chance. Your tap might have come with a manual showing the diameter at the base of the tap, is it equivalent to the tail diameter, etc? Also: Did your plumber fit new isolating valves? If so, were they full-bore ones?
Assuming bad pressure: you can increase pressure with improved plumbing to the taps: less friction, shorter run, wider supply to key taps, etc.
kkg337
JonoMarshall
@ectoplasmosis
I’ve just installed a new Grohe Minta kitchen tap, which is producing a significantly lower flow rate/pressure than my old Franke tap, and indeed most other taps I’ve used.
Plumber is saying it’s due to the ‘European’ narrow gauge feed hoses that the new tap has… to be fair, the flow rate for both hot and cold seems to be the same (unvented pressurised cylinder).
Is this just what modern Euro taps are like? Do I now need to find another bloody tap?